Application
The devices of the intrinsically safe industrial telephony PTI are designed to carry out telephone connection in industrial plants (coking, petrochemical, spirit, and other) characterized by the high degree of explosion hazard (II explosion group, categories 1, 2, and 3) as well as the high levels of noise and extensive dustiness, and other non-typical local conditions for telephone sets installation.
Cooperation
With all types of telephone exchanges
Power supply
Buffer – 48 or 60V DC
Capacity
- any, in modules of 16 NN
- maximum per one rack – 224 NN
- system maximum – unlimited
Station equipment
- SSI-PTI rack – equipped with the intrinsically safe separation units ZSI
Subscriber’s equipment
- Intrinsically safe mining telephones TIG and TIG-S (S – with optical signaling device)
- Intrinsically safe industrial broadcasting telephone PST
TIG technical data
| Marking | I M1 ExiaI Ma, II 1G Exia IIC T5 Ga |
| Power supply | central from intrinsically safe separation units ZSD (ZSI) |
| Polarity of the subscriber's line | any |
| Power consumption | ca. 23mA |
| Input impedance | 600 Ω |
| Nominal signal level | 0 dBm |
| Local effect attenuation coefficient | min. 16 dB |
| Calling signal loudness level | min. 90 dB from 1 m distance |
| Dialing | PM / DTMF |
| Numbers memory | redialing up to 32 digits direct access memory - 3 x 16 digits indirect access memory - 10 x 16 digits |
| Optical calling signal | visible from long distance |
| Casing protection degree | IP65 |
| Dimensions | 275x140x90 mm |
| Weight | ca. 2.5 kg |
| Operating temperatures range | from -40 to +40 ° C |
